The jaws are individually wrapped by coils of copper wire. It is compact in size and very easy to carry and operate. There are 156 suppliers who sells tong tester on, mainly located in asia. However, in dc conductors, the current flows in a fixed polarity. Radiation devices have the advantage of not having to touch the material being measured. This post will discuss tong tester types, operating principle and how to operate it. We offer diverse range of clamp meter tong tester in the market. Manual and automatic test cases an effective testing process must include both manually and automatically produced test cases. This series universal testing machine is mainly used to do stretching, compression and bending testing for metal and nonmetals such as rebar,wire rope,anchor rod,bolt fastener,cable and so on. Texas international oilfield tools tiot offers a free standing test stand for testing of hydraulic casing and tubing power tongs. Frequency meter phase sequence meter multimeter analog and digital tong tester techometer. A clamp allows you to measure current without breaking the circuit and. Voltage for testing produced by hand operated megger by rotation of crank in case of hand operated type, a battery is used for electronic tester.
Working principle of synchroscope and phase sequence indicator, tong tester clampon meter, signal generator, ac milivoltmeter, tachometer. The top countries of suppliers are china, hong kong s. Over which there is a coil wounded, which acts as a secondary coil. A clamp meter is basically a currentmeasuring tool with some voltage abilities. The arm of tong tester senses the magnetic flux of the primary winding i. When the dial is in the correct position, shows on the display, meaning that the readings are coming from the flexible probe. Measuring the voltage output of a vfd is now a common measurement.
Manual tests take advantage of the testers domain knowledge to do more indepth testing. Pyrometer, device for measuring relatively high temperatures, such as are encountered in furnaces. A multimeter ora multitester, also known as a voltohm meter or vom is, an. An ammeter is an instrument used to measure direct current and alternating current in an electric circuit. This is used in each and every house and industry for calculating the energy consumed by them. A typical multimeter may include features such as the ability to measure. When we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phase line tester, then circuit is completed and current start to flow in metallic rod, hence the neon bulb inside mains tester glows. Dc clamp meters work on the principle of the hall effect. In general hall elements are used as a sensor to detect dc current because it is not possible to employ an electromagnetic induction method as used for dedicated ac clamp meters. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. A wide variety of tong tester options are available to you, such as digital only. What is the working principle of taung tester clamp meter.
Clamp meters using current transformer for ac measurement current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. Electrical engineering longowal polytechnic college. Pdf test file congratulations, your computer is equipped with a pdf portable document format reader. It is often incased in glass and has a disk that rotates that measures the amount of power product of current and voltage the flows through the meter. This series testing machine is widely used in aerospace, petrochemical industry,wire and cable,machinery manufacturing,plastic, rubber,mining,ceramic. Ammeter working principle and types of ammeter electrical4u. They are distinctly different instruments, each with its own advantages. Clamp meter abcs with technological advances in electrical equipment and circuits come more challenges for electricians and technicians. For good insulation, the resistance usually reads in the megohm range. These advances not only require more capability in todays test equipment, but more skills on the part of the people who use them. Induction motor three phase induction motor working principle. Energy meter digitalanalog insulation tester megger, earth tester.
The working principle of an electronic energy meter is a device that measures the electronic energy consumed usually in kwh. Most pyrometers work by measuring radiation from the body whose temperature is to be measured. Uses of clamp meter for industrial appliances, industrial devices, residential commercial industrial electrical systems and commercial industrial hvac, clamp meters are used. Discover over 171 of our best selection of amp clamp meter, ac dc clamp, multimetr, clamp current on with topselling amp. Current transformer clamp meter tong tester used to measure ac current. Introducing tecpel 3 34 digit clamp meter, 040a, 0400a, for current measurement from multimeter clamp on meter taiwan quality ma. Clamp meters working principle clamp meters using current transformer for ac measurement current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. Conn0608 lay single three phase cable and install equipment at construction sites. The megger insulation tester is a small, portable instrument that gives you a direct reading of insulation resistance in ohms or megohms. Working on a hot circuit involves extra risk to the user and all equipment involved. In years past, electricians used test probes rather than a clamp to measure current.
Automatic tests take advantage of tireless machines to do more testing than humans can. Dwt dead weight tester is based on the principle of pascals law. The test stand is designed to resist torque applied by a power tong through a test mandrel. You should be able to view any of the pdf documents and forms available on our site. Construction working of mains tester working of a phase or line tester. Please note that the current output ot 440 volt capacitor connected to a system of 415 volt will be lesser than rated value. Construction of phase or line tester following are the main parts of a typical phase or line tester. Mar 28, 2016 how a acdc clampmeter works kainkalabs. Ordinary clampmeters used to measure ac currents work on the principle of electromagnetic induction caused by the alternating current flowing in the conductor which reverses direction causing a dynamically changing magnetic field. Megger working principle types history uses of megger.
Clamp meter is an eletrical tester having an ac clampmeter and voltemeter for testing the flow of electricity current in a conductor. An electrical meter with integral ac current clamp is known as a clamp meter, clampon ammeter or tong tester. To convert a galvanometer into an ammeter, a shunt resistance is connected in parallel. Working principle of megger voltage for testing produced by hand operated megger by rotation of crank in case of hand operated type, a battery is used for electronic tester. Sep 07, 2009 a dc clampmeter works on the principle of the hall effect. Ensure that the tong tester multimeter used is of true rms type. Clamp meters are available with small sized cords for testing the flow of electricity current in the electrical appliances. Infrared sensing techniques for adaptive robotic welding the current was measured using a columbia electric mfg. A clamp meter usually measures to the nearest tenth or hundredth of a unit, rather than in the milliunits available with a dmm. In general hall elements are used as a sensor to detect dc current because it is not possible to employ an. Three phase energy meter working,construction an energy meter is used to measure the energy consumed in the kilowatt hours. Tong tester free download as powerpoint presentation.
Clamp meters working principle instrumentation tools. A wide variety of digital tong tester options are available to you, such as usage, feature, and power. In order to use a clamp meter, only one conductor is normally passed through the probe. The clip or clamp or moving part of meter has a magnet in it which act as a magnetic core as in transformer. Download as pptx, pdf, txt or read online from scribd.
Electrical machines is a subject where a student will deal with various types of electrical machines. Current transformer clamp meter tong tester operating principle and how it works. A current transformer based tong tester clamp meter consists of two clamps made of ferrite iron. For industrial appliances, industrial devices, residential commercial industrial electrical systems and commercial industrial hvac, clamp meters are used. The megger insulation tester is essentially a highrange resistance meter ohmmeter with a builtin directcurrent generator. Tong tester or clamp meter basically works on the principle of mutual inductance.
As shown in a figure at left, a hall element is placed across a gap created by cutting off part of the transformer jaws. Induction motor three phase induction motor working principle production of rotating magnetic field, squirrel. Working principle of synchroscope and phase sequence indicator, tong tester clampon meter. Apr 14, 2020 an electrical meter with an integral ac current clamp is known as a clamp meter, a clampon ammeter, a tong tester or, colloquially, an amp clamp. An electrical meter with an integral ac current clamp is known as a clamp meter, a clampon ammeter, a tong tester or, colloquially, an amp clamp. Due to the high harmonic content in the signal coming out of a vfd to the motor, a dmm would measure most of the voltage content depending on its input bandwidth. In electrical and electronic engineering, a current clamp or current probe is an electrical device. Fhp motors, repulsion motor, stepper motor, hysteresis motor, reluctance motor. Introducing tecpel 3 34 digit clamp meter, 040a, 0400a, for current measurement from multimeter clamp on meter taiwan quality manufacturer.
Indispensable as a test tool, the jaws of a clamp meter facilitate work in tight spaces and permits. Current transformer clamp meters are equipped with rigid jaws of made of ferrite iron. About 61% of these are clamp meters, 2% are power meters, and 4% are multimeters. Only one conductor is normally passed through the probe. A digital multimeter dmm allows you to do electronic work because it offers high resolution, measuring.
Best value tong tester great deals on tong tester from. The columbia tong test ammeter illustrated is an example of the iron vane type, used for measuring large ac currents up to. Capacitors explained the basics how capacitors work working principle duration. The complete guide to electrical insulation testing. We clean your instrument, check fuses, replace battery if required and check test leads if supplied then carry out a verification in accordance to the manufacturers specifications if available.
Keep fingers behind tactile barrier on face of meter. Metallic rod and mouth it is a cylindrical metal rod. Capacitors explained the basics how capacitors work working principle. Electrical contractor working on panels and branch circuits measure loads on a branch circuit at a panel including feeder cables, branch circuits, and neutrals and the continuity of switches, fuses, and contacts measure load side voltage of a breaker or fuse check if a circuit is live before beginning work.
An energy meter is used to measure the energy consumed in the kilowatt hours. The usual analog multimeter when used for voltage measurements loads the circuit under test to some extent a microammeter with fullscale current of 50. Jun 08, 2019 ammeter means amperemeter which measures ampere value. Working principle of speedometer is the torque of the motion of the wheels is read through a meter and is visible to the user. What is clamp meter tong tester types, operating principle. A digital multimeter is essentially a voltagemeasuring tool with some current abilities. Yukon department of education box 2703 whitehorse,yukon canada y1a 2c6.
An electrical meter with integral ac current clamp is known as a clamp meter, clampon ammeter, tong tester, or colloquially as an amp clamp. Their basic operation is like that of a transformer. Ammeter means amperemeter which measures ampere value. We are offering a wide spectrum of testing instruments such as tong tester that is extensively used for dependable testing of various parameters. Ideally, ammeter function works only if it has zero resistance.
Clamp meter tong tester is one of the most useful test equipment. The hall effect, named after edwin hall who discovered it 1879, states that when a conductor carrying current is placed in a magnetic field, a potential is induced across the conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. Together, they form a magnetic core during measurements. Accessories for impact testing machines, self centering. Working of a phase or line tester when we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phaseline tester, then circuit is completed and current start to flow in metallic rod, hence the neon bulb inside mains tester glows. Clamp meter tong tester digital tong tester wholesale. Fluke tong tester buy and check prices online for fluke. Get tong tester at best price with product specifications. Consequently, the magnetic field around the conductor is fixed. The law states that in a closed system of incompressible fluid, the pressure applied will exert equal amount of force in all the directions. Load determination distribution between generators operating in. The main principle of ammeter is that it must have a very low resistance and also inductive reactance. Job functions applications key features recommended clamp electrical contractor working on panels and branch circuits measure loads on a branch circuit at a panel including feeder cables. A fluke tong test ammeter is located in the inlet circuit of phase a to measure the current of iacin the ac circuit.
Hall effect clamp meter tong tester used to measure ac as well as dc current. Tong tester are more than current meters these days, they can measure ac and dc volts, ac and dc current, temperature, capacitance and frequency. Clamp meters using current transformer for ac measurement. It is an easy to use test equipment and is useful in the measurement of a liveconductor without damaging powering down the circuit. Accessories for impact testing machines, self centering tong. Premeasurement steps to avoid electrical shock or personal injury. This arm of the tong tester is connected to a measurement circuitry which in turn provides the currentreading finally. Oct 22, 2017 tong tester or clamp meter basically works on the principle of mutual inductance. By joining cr4 you can subscribe to this discussion and receive notification when new comments are added. It is an easy to use test equipment and is useful in the measurement of a liveconductor without damaging.
It is sturdy and made from the best grade of components that are. When we touch mouth flat end of the metallic rod of phase or line tester with naked live hot wire whereas one of our finger touch the metallic cap screw or clip of phaseline tester, then circuit is completed and current start to flow in metallic rod, hence the neon. The flat end mouth is used as a screw driver or touch electrical conductorswires to f. Ampere is the unit of current so an ammeter is a meter or an instrument which measures current. Steps for measuring ac or dc current using a clamp meters jaws.